I should clarify what I'm doing. The CF will be on the spar and the WAF's will attach as normal.
Doing: WAF-CF-SPAR-CF-WAF. NOT doing: CF-WAF-SPAR-WAF-CF. This arrangement will add strength to the spars where the WAF's attach yet the WAF's will still have flex and can still be inspected. Gene Leone, Worland, Wyoming "Michael Moore is a living example to NEVER trust ANYONE who's bigger around than they are tall!" -------Original Message------- From: Colin & Bev Rainey List-Post: krnet@list.krnet.org Date: 12/02/04 02:11:15 To: KRnet Subject: KR> Spars and extra materials Netters Search the archives and I am sure you will find a comment from one of the more learned builders cautioning against randomly adding your own reinforcements" to assemblies with out first testing the results. The WAFS have never failed when properly built, and I fly behind them and trust them fully. The wrappings of carbon fiber I believe is a BAD idea. Many metals gain their strength in their ability to flex with loads, not remain rigid. If you stiffen the WAFs with carbon fiber, the mixing of the two materials may lead to the initial loads being taken by the CF and then when it breaks, abruptly load the WAFs instead of a gradual load causing them to be stressed by a snapping shearing force instead of a tensile gradually applied load. This sudden load may exceed the strength of the WAF when normally it would not due to the sudden application of force. Also future inspection becomes impossible and it is possible to then have what is now a BAD problem with Long Eze and Var! i Eze aircraft where the wing attach hardware is being found to have corroded and allow the wing to fall off if not replaced. You would not be able to see the corrosion buildup, until during pre-flight you noticed excessive movement of the wing. What the builder did who built mine is he extended the wood through the front WAFs so that the bolts travel through the WAF AND the wood in order to connect the wings, making for as close to solid wings as you can get with them still removable. Other areas of the aircraft are going to give you problems way before the WAFs do, focus on those areas, and don't try to re-invent the wheel. That part aint broke, so don't try to "fix it". FLY SAFE! Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com http://kr-builder.org/Colin/index.html _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
